Not every transfer plan even being prepared for months before will be smooths when the transfer window finally opened.
You do realize it's not just us that experience this but so other clubs which makes that this is a common occurence that transfer plan will not always going on exactly as planned.
Even if we get every single of our target, not all of them is going to be work immediately so there will be always be a risk.
Anyway true winner is at the end of season winning major thropies and not winning a battle of transfer windows.